The $PM_{10}$ and $PM_{2.5}$ aerosols were collected at Busan from March to May, 2005, and the concentrations of some metallic elements were analysed to study their characteristics. The mean concentration of $PM_{10}$ was $66.5{pm}23.0{mu}g/m^3$ with a range of 22.2 to $118.1{mu}g/m^3$. The mean concentration of $PM_{2.5}$ was $46.1{pm}17.2{mu}g/m^3$ with a range of 9.7 to $83.3{mu}g/m^3$. The ratio of $PM_{2.5}/PM_{10}$ was 0.69 at Busan. The distribution of metallic elements for $PM_{10}$ and $PM_{2.5}$ were Cd<Ni<Cr<Ti<Sr< ${ldots}$ <Al<K<Fe<Si<Na and Cd<Cr<Ti<Ni${ldots}$ <K<Al<Si<Fe<Na, respectively. The mean mass concentrations of Asian dust and non Asian dust in $PM_{10}$ were $94.9{mu}g/m^3$ and $63.7{mu}g/m^3$, respectively. And The mean mass concentrations of Asian dust and non Asian dust in $PM_{2.5}$ were $56.9{mu}g/m^3$ and $45.1{mu}g/m^3$, respectively. The mean values of crustal enrichment factors for five elements (Cd, Cu, Pb, V and Zn) were all higher than 10, possibly suggesting the influence of anthropogenic sources. The soil contribution ratios for $PM_{10}$ and $PM_{2.5}$ were 20.5% and 19.4, respectively.